package com.wc.alorithm_blue_bridge._动态规划.Q3637;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

/**
 * @Author congge
 * @Date 2024/1/15 17:10
 * @description
 */


public class Main {
    static int maxN = (int) 1e4 + 7;
    static int[] dp = new int[maxN];
    static int[] wvs = new int[maxN];
    static int n, m;
    static FastReader sc = new FastReader();
    static int sum = 0;

    public static void main(String[] args) {
        n = sc.nextInt();

        for (int i = 1; i <= n; i++) {
            wvs[i] = sc.nextInt();
            sum += wvs[i];
        }

        if ((sum & 1) == 1) {
            System.out.println("no");
            return;
        }
        m = sum / 2;
        for (int i = 1; i <= n; i++) {
            for (int j = m; j >= wvs[i]; j--) {
                dp[j] = Math.max(dp[j], dp[j - wvs[i]] + wvs[i]);
            }
        }
        if (dp[m] == m) {
            System.out.println("yes");
        } else {
            System.out.println("no");
        }
    }
}

class FastReader {
    StringTokenizer st;
    BufferedReader br;

    FastReader() {
        br = new BufferedReader(new InputStreamReader(System.in));
    }

    String next() {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }

    int nextInt() {
        return Integer.parseInt(next());
    }

    String nextLine() {
        String s = "";
        try {
            s = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return s;
    }

    long nextLong() {
        return Long.parseLong(next());
    }

    double nextDouble() {
        return Double.parseDouble(next());
    }
}

